AMD Radeon DRIVER GLITCH

AMD Radeon Driver 20.4.1

This is one of the bugs that exist in the recent AMD drivers for the 5700 XT. It may also exist for other AMD cards with this driver or for this card on the 20.4.2 or 20.5.1 driver. This one was very difficult to isolate. I enabled the “Video Replay” feature in the AMD driver panel. A few days later many of my favorite games started to “hitch or stutter” during random events in the games I play. One of my favorite games that worked flawlessly before the change is Kingdom Come: Deliverance. I spent some time searching for any solutions.

I tested temperatures and enabled logging for temperature events, I looked at SMART data for my NVMe drives, I ran the typical sfc /scannow. I checked DirectX diag log files. Spent a lot of time searching for the proverbial needle in the hay stack that changed my performance.

RESULT: Disable the Video Replay in the AMD Video Driver panel and test your results. This solved my problems in Kingdom Come: Deliverance and in other titles on my system.

Userbench fails Sphere graphics test. Possible solution.

If you are experiencing an error running the userbench suite of tests, and the error indicates “ERROR: Sphere GPU benchmark failed, aborting further tests on this GPU” then this MAY solve your issue.

I isolated this error on my system to the Nahimic service that is a part of the Realtek Audio driver package. To verify this as the cause on your system:

  1. Open the control panel.
  2. Administrative Tools applet. *You may need to change the view in your control panel to large icons to see this as an icon. Check the drop down menu at the top right area of your control panel.*
  3. Click on Services.
  4. Disable the Nahimic service by right clicking on it in the list, properties, then disable. Reboot for that change to take effect.
  5. Test userbench.

IF userbench now runs successfully, then Nahimic service IS the cause. The real solution is to update the Nahimic service to the latest version. In my case I have an ASUS Z370-E Motherboard and there is an update package on the ASUS Support page. IF you have a Z370-E here is the link for the audio driver update. You probably will need to find the update that corresponds to your motherboard at the manufacturer’s web site of YOUR motherboard.

Steps:

  1. Download the update.
  2. Extract or unzip or unpack the update.
  3. Run the Setup.exe file.
  4. Say yes to the prompt to uninstall your existing driver and install the new one.
  5. Reboot when it suggests.
  6. Wait for the installer to resume after the reboot.
  7. Reboot again after the install completes.
  8. Run the AsusSetup.exe to update the Nahimic service, this won’t work correctly if the service is disabled. Enable it and reboot if necessary. Reboot again AFTER the AsusSetup.exe completes it’s install.
  9. Test userbench with the new version of the Nahimic service running.

Your mileage MAY vary. Good Luck!

Linux Mint 19.2 Install of Netgear A-7000 USB 3.0 Wireless adapter

The following outlines the procedure to install the “rtl8814au” driver for Linux Mint 19.2

The kernel recommended is 5.0 or greater.

sudo apt install build-essential
sudo apt install bc
sudo apt install linux-headers-$(uname -r)
sudo apt install git dkms
sudo apt update && sudo apt upgrade
git clone https://github.com/tpircher/rtl8814AU
cd rtl8814au
make
sudo make install
sudo cp -R . /usr/src/rtl8814au-4.3.21
sudo dkms build -m rtl8814au -v 4.3.21
sudo dkms install -m rtl8814au -v 4.3.21

Fedora 18 firewall.

I upgraded to Fedora 18.  Then verified my web server was running.  Then attempted to visit this site.  I was not able to.    The problem was the new firewall daemon in Fedora 18.   Despite the config file indicating that port 80 was open for http traffic, it was not.

I had to install firewall-config.

yum install -y firewall-config

Then I used firewall-config enable traffic for port 80.  This solved the problem.

Apache web server 2.4 on Fedora 18

I recently upgraded my web server system from Fedora 17 to Fedora 18.  I used fedup to do so.  The upgrade went fairly smooth.

A couple days later I noticed that Apache ( httpd ) was not running.   In the course of trouble shooting I had to disable selinux.    When I enabled selinux again, there was a new issue.

The first issue I noticed is that by default, the ServerName directive in the apache config (httpd.conf) file is remarked out.

The error shows up as the following in your /var/log/httpd/error_log file.

Could not reliably determine the server’s fully qualified domain name

The solution for that error is to edit your /etc/httpd/conf/httpd.conf file.

Change the line (line 95 in my file) that reads

#ServerName

to

ServerName localhost

The next error:

No such file or directory: AH01762: Failed to create shared memory segment on file /run/httpd/authdigest_shm

Which had the following error hand in hand with it:

no such file or directory: AH01760: failed to initialize shm – all nonce-count checking, one-time nonces, and MD5-sess algorithm disabled

Both of these errors can be fixed by creating the /run/httpd directory and then changing the ownership to apache and group to apache.  This seems to be a result of disabling and then enabling selinux.

mkdir /run/httpd/

chown -R apache /run/httpd

chgrp -R apache /run/httpd

 

 

Howto: LiveUSB – request by students of Long Beach City College.

Howto:
LiveUSB

1) Download the latest live image.  You can download it from the official Fedora mirrors.

a) Fedora 15 Live Images – Live Images for Fedora 15

2) Download and install LiveUSB Creator.

a) Windows – LiveUSB-Creator

b) Linux – run su -c yum install liveusb-creator -y

3) Install the LiveUSB Creator program.

4) Insert the flash drive you want to LiveUSB to run on.

5) Open the LiveUSB Creator Program.

6) Browse to the folder you saved the Live iso image to in step 1).

7) Select a size for the persistent image.  I use 1024M.

8) Click on create now.

Go grab a cup of java. This part can take up to 15 minutes. When it completes, you have a boot-able LiveUSB drive.

Howto: Backup your data files

I can never overemphasize the importance of this enough.

Back up your important data files. Daily.

This is a very simple procedure. It takes approximately five minutes. It will save your files.

1) Insert a thumb or flash drive into any USB port on your computer.
2) For Windows copy your “My Documents” folder contents to the the thumb drive. If you use any flavor of Linux, copy the contents of your “home” directory.
3) Right click on the safely remove tray icon, then click on safely remove for the thumb drive.
4) Place your thumb drive in a safe place.

The outcome is that you have your important files in case of virus infection, hard drive failure, or any other form of system failure.
The average cost for recovering files from a failed hard drive is $1000 and yields less than optimum results. Even with expert recovery services, 20-80% of your files can be recovered for a failed hard drive. The method of backup suggested is 100% effective.

If you have information of a sensitive nature, secure your thumb drive in a fire safe or other suitable container.

If you have data that would potentially make or break your business, I highly recommend you send a copy of the files to a friend or relative you trust implicitly on a weekly basis.

There are also numerous web based backup services that provide a complete solution for modest price point, such as Carbonite.com which charges $59 per YEAR.